Create DNS records at 1&1 Internet for Office 365

Caution: Note that 1&1 Internet doesn’t allow a domain to have both an MX record and a top-level Autodiscover CNAME record. This limits the ways in which you can configure Exchange Online for Office 365. There is a workaround, but we recommend employing it only if you already have experience with creating subdomains at 1&1 Internet.

If despite this service limitation you choose to manage your own Office 365 DNS records at 1&1 Internet, follow the steps in this article to verify your domain and to set up DNS records for email, Skype for Business Online, and so on.

Note: Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you’re having trouble with mail flow or other issues after adding DNS records, see Troubleshoot issues after changing your domain name or DNS records.

Add a TXT record for verification

Before you use your domain with Office 365, we have to make sure that you own it. Your ability to log in to your account at your domain registrar and create the DNS record proves to Office 365 that you own the domain.

Note: This record is used only to verify that you own your domain; it doesn’t affect anything else. You can delete it later, if you like.

On the Manage domains page, select the domain that you are verifying and then, in the Action column for that domain, choose Start setup.

On the Add this TXT record to show you own domain_name page, choose Okay, I've added the record.

Choose Next.

Note: Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you’re having trouble with mail flow or other issues after adding DNS records, see Troubleshoot issues after changing your domain name or DNS records.

Add the four CNAME records that are required for Office 365

1&1 Internet requires a workaround so that you can use an MX record together with the CNAME records that are required for Office 365 email services. This workaround requires you to create a set of subdomains at 1&1 Internet, and to assign them to CNAME records.

In the Alias: box, type or copy and paste only the Alias value from the following table.

Create Subdomain

Alias

msoid

clientconfig.microsoftonline-p.net

Select the check box for the I am aware disclaimer.

Choose Save.

In the Edit DNS Settings dialog box, choose Yes.

Optional CNAME records

The additional CNAME records created in the following procedure enable Skype for Business Online services. You will employ the same steps that you used to create the two CNAME records you have already created.

Important: Some 1&1 Internet plans allow a maximum of five subdomains. Make sure that you have at least two additional subdomains available before starting this procedure.

Create the third subdomain (Lyncdiscover).

On the Subdomain Overview section, choose Create Subdomain.

In the Create Subdomain box for the new subdomain, type or copy and paste only the Create Subdomain value from the following table. (You'll add the Alias value in a later step.)

Create Subdomain

Alias

lyncdiscover

webdir.online.lync.com

Choose Create Subdomain.

On the Domain Center page, choose Manage Subdomains.

In the Subdomain Overview section, find the lyncdiscover subdomain that you just created, and then choose the Panel (v) control for that subdomain.

In the Alias: box, type or copy and paste only the Alias value from the following table.

Create Subdomain

Alias

sip

sipdir.online.lync.com

Select the check box for the I am aware disclaimer, and then choose Save.

In the Edit DNS Settings dialog box, choose Yes.

CNAME records needed for MDM

Important: If you have Mobile Device Management (MDM) for Office 365, then you must create two additional CNAME records. Follow the procedure that you used for the other four CNAME records, but supply the values from the following table.

Add a TXT record for SPF to help prevent email spam

Important: You cannot have more than one TXT record for SPF for a domain. If your domain has more than one SPF record, you'll get email errors, as well as delivery and spam classification issues. If you already have an SPF record for your domain, don't create a new one for Office 365. Instead, add the required Office 365 values to the current record so that you have a single SPF record that includes both sets of values. Need examples? Check out these details and sample SPF records. To validate your SPF record, you can use one of these SPF validation tools.

Add the two SRV records that are required for Office 365

To get started, go to your domains page at 1&1 Internet by using this link. You’ll be prompted to login.

Choose Manage domains.

On the Domain Center page, find the domain that you want to update, and then choose the Panel (v) control for that domain.

In the Domain Settings area, choose Edit DNS Settings.

In the TXT and SRV Records section, choose Add Record.

(You may have to scroll down.)

Add the first of the two SRV records.

In the Add Record area, in the boxes for the new record, type or copy and paste the values from the first row in the following table.

(Select the Type and TTL values from the drop-down list.)

Type

Service

Protocol

Name

Host

Priority

Weight

Port

TTL

SRV

sip

tls

(Leave this field empty.)

sipdir.online.lync.com

100

1

443

3600 (1 h)

SRV

sipfederationtls

tcp

(Leave this field empty.)

sipfed.online.lync.com

100

1

5061

3600 (1 h)

Choose Save.

Choose Save.

In the Edit DNS Settings dialog box, choose Yes.

Add the other SRV record.

In the TXT and SRV Records section, choose Add Record.

In the Add Record area, create a record using the values from the other row in the table, and then again choose Add, Save, and Yes to complete the record.

Note: Typically it takes about 15 minutes for DNS changes to take effect. However, it can occasionally take longer for a change you've made to update across the Internet's DNS system. If you’re having trouble with mail flow or other issues after adding DNS records, see Troubleshoot issues after changing your domain name or DNS records.